Derrick.



G. P. SLATER.

] DERRICK. APPLICATION FILED MAY 26, 1913.

Patented June 9, 1914.

2 SHEETS-SHEET 1.

anuznlfo'a G. P. SLATER.

DERRICK.

APPLICATION FILED In as, 1913.

mi h mm m. A 2 4 a w wumm GUY r. sLA'rnn, or TULSA, OKLAHOMA.

DERRICK.

Specification of Letters Patent.

Patented June 9, 1914.

Application filed May 26, 1913. Serial No. 770,036.

To all whom it may concern Be it known that I, GUY P. SLATER, a citizen of the United States, residing at Tulsa, in the county of Tulsa and State of Oklahoma, have invented certain new and useful Improvements in Derricks, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to certain new and useful improvements in derricks especially adapted to be used in connection with rigging in drilling oil, gas and Artesian wells; the object being to provide a derrick which is formed of a plurality of sectional legs so connected together that they can be set up or taken down without loosening or tightening a bolt.

Another object of my invention is to provide novel means for interlocking the abutting ends of the leg sections forming the frame of the derrick with the girths, thereby preventing all danger of the legs moving in any way after being set up.

Another object of the invention is to provide a derrick which is exceedingly simple and cheap in construction and one which is very strong and durable; the abutting ends of the leg sections bein embraced by corner plates rigidly connecte to the upper end of each section and provided with slots to receive bolts carried by the lower ends of each section in order to interlock the sections and plate together without operating nuts or fastening means of any kind.

Another object of the invention is to provide a derrick in which the girths are provided with notched interlocking ends fitting in transverse intersecting grooves-formed in the abutting ends of the leg sections, whereby the girths and legs are securely locked together.

Other and further objects and advantages of the invention will be hereinafter set forth and the novel features thereof defined by the appended claims.

In the drawings-Figure 1, is a side elevation of a derrick constructed in accordance with my invention; Fig. 2, is a detail enlarged horizontal section through one of the corner plates showing the lower leg and girths interlocked together; Fig. 3, is a detail enlarged side elevation of the angle plate and the abutting ends of the legs and girths; Fig. 4, is a detail perspective of the lower end portion of one of the legs; Fig. 5, is a detail perspective of the upper end portion of one of the legs; Fig. 6, is a side elevation of the end portion of one of the girths; Fig. 7, is a side elevation of the end portion 15 of the girth; Fig. 8, is a horizontal section taken through the complete derrick showing the angle bolts used in connection with the angle plates for preventing the upper legs from jumping apart by the rebounding action of the derrick caused by the breaking of the cable rigging; and Fig. 9, 1s a detail perspective of a portion of the angle plate.

Like numerals of reference refer to like parts in the several figures of the drawings.

In carrying out my invention, I construct a derrick in the form of a rectangular frame slightly converging and formed of a plurality of legs 1 herein shown formed of wood rectangular in cross section arran ed in longitudinal alinelnent with their en s abutting to form a complete corner post for the derrick, as clearly shown.

In the form of derrick illustrated, the lower legs 2 are of greater length than the upper legs and are connected together by braces 2 but it is of course understood that the legs 2 can be formed of the same length as the upper legs, but in this class of derrick the lower legs thereof are generally formec of a greater length as they can be readily handled. The abutting ends of the legs are provided with transverse intersecting grooves 3 and 4 adapted to receive the flat-- tened ends 5 of girths 6 which are preferably formed tubular and as herein shown, formed of pipe. The flattened ends 5 of the girths 6 are provided with notches 7 and are adapted to be interlocked together as shown in Fig. 2; the depths of the grooves 3 and 4 being substantially half of the width of the flattened portions 5 so that when the girths are arranged at right angles to each other in the grooves formed in the upper end of the leg, they will project above the end thereof to receive the grooves formed in the lower end of the leg. 1

Secured to the 11 per end of each leg 1s an angle plate 8 which projects up above the end thereof and is preferably secured in position upon the leg by bolts 9 and 10 extending transversely through the le s at right angles to each other and in di erent horizontal planes in order to secure the plate rigidly to the end of the leg, as will be later described. The plates are provided with slots 11 at their upper ends of diiierent len -hs adapted to receive transversely arranged bolts 12 and 13' which extend through the leg adjacent its lower end at right angles to each other and in difierent horizontal planes; said bolts being provided with nuts. It will be seen that 'when the upper legs are placed in position within the angle plates, the bolts 12 and 13 drhp into the slots 11 and prevent the lower end portions of the legs from moving in respect to each other.

In order to provide means for preventing the lower ends of the legs from jumping from over the girths, I provide the angle plate 8 with angle bolts 14, as clearly shown in Figs. 3 and 8, which embrace the lower ends of the legs in such a manner that it is impossible for the legs to jump apart by the rebounding of the derrick caused by the cable breaking.

It will be noticed that I have described that the legs are formed of Wood and are provided with bolts co-acting with the slots of the angle plates, but it is of course understood that when a derrick is constructed of metal, the legs could be cast with projections having heads co-acting with the slots which would accomplish the same result as the nuts carried by the bolts in this instance, are not operated or tightened after the legs have been placed in position. 1 Each corner of the angle plate 8 is provided with an opening 15 adapted to receive a hooked end 16 of a rod 17; the end of which is provided with a'threaded portion co-acting with a turn buckle 18 and as herein shown, the rods 17 are of different lengths in order to place the turn buckles 18, adjacent one corner ost in order to allow the same to be readily operated in assembling the derrick. The upper legs are connected together by sills 19 carrying eye bolts 20 to which the hooked ends of the upper rods forming the braces are connected in. the same manner as the lower rods are connected to the angle plates, in order to securely brace the complete derrick by diagonally arranged brace rods which can be readily detached by simply loosening the turn buckles connecting the ends thereof. The lower brace rods have their hooked ends connected to eye bolts 21 fixed in the legs, as clearly shown. In assembling the derrick as constructed in accordance with my invention, the four lower legs 2 are placed in position and connected together by braces 3 in any suitable manner; the upper ends of the legs 2 having the angle plates secured thereon. The girths 6 are then placed in the grooves formed in the upper ends of the legs with the notched ends interlocked. The next set of legs are then placed in position upon the girths; the

projecting portions of the girths extending into the grooves formed therein and the lower portions of the legs are embraced by the angle bolts 14 so as to hold the legs in that position. It will be seen that it is necessary to force the legs into contact with the girths from an upright position in order to allow the bolts 12 and 13 to pass into the slots 11 ofjthe angle plates 8. The brace rods are then donnected to the angle plates and eye bolts and this operation is completed until a derrick has been formed of the desired height.

By this manner of constructing a derrick, the same can be assembled or taken apart without operating a nut of any kind, it only being necessary to operate the turn buckles to loosen the braces, and if necessary, each section forming the complete derrick can be detached as a whole or placed in position as a whole in assembling.

I claim;

1. A derrick formed of a plurality of sectional legs, the sections of each leg being arranged in longitudinal alinement, transversely arranged girths connecting the respective legs formed by said sections, the abutting ends of said leg sections being transversely grooved to receive said girths, and means embracing said sections at the joint thereof, said means having a fixed connection with one section and a movable connection With the abuttin section.

2. A derrick formed 0% a plurality of sectional corner posts, the abutting ends of each section being provided with grooves,

girths arranged in said grooves having an interlocking connection, and connecting members for said posts having a fixed connection with the upper end of one post and a detachable connection with the lower end of the adjacent post.

3. A derrick, comprising a rectangular framevformed of a plurality of legs, each leg being formed of sections arranged in longitudinal alinement, transversely arranged girths having an interlocking connection with said leg sections at the joints thereof, and angle plates embracing said legs, said angle plates having a fixed connection with one leg section and a movable connection with the other leg section.

4. A derrick having sectional legs, girths having interlocking connections with the abutting ends of said leg sections, an angled bolt embracing one of said sections, and an angled plate embracing said sections at the joint thereof having a fixed connection with one of said sections and a movable connection with the abutting section.

5. A derrickformed of sectional legs and transversely arranged girths, the abutting ends of aid leg sections and the ends of said girths having an interlocking connection, and means embracing said sections at the joint thereof having a fixed connection with one section and a movable connection with the abutting section. 1

6. In a derrick, the combination with sectional legs, of angled plates embracing said legs at the joints of the sect-ions thereof, said plates having a fixed connection with one section and a movable connection with the adjacent section, girths connecting said legs having overlapping ends arranged bet-ween the abutting ends of said leg sections, and rods connecting said angled plates.

7. A derrick having sectional legs, the abutting ends of said sections being provided with intersecting grooves, and gi'rths having overlapping ends seated in said grooves.

8. A derrick having sectional legs, the abutting ends of said sections being provided with intersecting ooves, and girths having interlocking notc ed ends seated in said grooves.

9. A derrick having sectional legs, the abutting ends of said sections being provided with registering intersect-ing grooves arranged at right angles to each other, girths for connecting said legs, said girths having flattened end portions provided with notches seated in said grooves, said notches forming an interlocking connection bet-ween the adj acent girths.

10. A derrick having sectional legs, the abutting ends of said sections being provided with intersecting grooves, girths having overlappin ends seated in said grooves, and means em racing said sections at the joints thereof having a fixed connection with one section and a movable connection with the abutting section.

11. A derrick comprising a frame substantially rectangular in cross section having sectional legs, the upper end of each section of each leg having an angle plate fixed thereto provided with grooves, the lower end of each section being provided with projections co-acting with said grooves, and girths having overlapping interlocking ends arranged between the abutting ends of said sections.

12. A derrick formed of four sectional legs, the upper end of each leg section having an angle plate connected thereto projecting upwar ly therefrom, a projection carried by the lower end of each leg section having an interlocking connection with said plate, and irths arranged horizontally between the a utting ends of said legs having an interlocking connection therewith.

13. A derrick having sectional legs, each leg being formed of a plurality of angular sections, angle plates embracing the upper end of each section provided with slots, projections carried by the lower end of each section co-actin with said slots, and girths having interloc ing ends arranged bet-ween the abutting ends of said leg sections.

14. A derrick formed of sectional legs connected together by brace rods and girths, said girths having interlocking notched ends arranged between the abutting ends of said leg sections, and angle plates fixed to the upper end of each section having an interlocking connection with the lower end of the abutting section.

15. A derrick formed of a substantially rectangular frame comprisin corner posts formed of vertically arrange sections, the abutting ends of said sect-ions being provided with intersecting grooves, girths seated in said grooves having interlocking connec-. tions, connecting members for said legs having a fixed connection with one leg and a movable connection with the adjacent leg, and angle bolts carried by said members embracing the lower end of each section.

In testimony whereof I aifix my signature in presence of two witnesses.

' GUY P. SLATER.

Witnesses:

E. J. LAMBERT, C. B. Rows. 

